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G.Skill F3-12800CL9D-8GBXM G.SKILL Ripjaws X Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Low Voltage Desktop Memory Model F3-12800CL9D-8G
G.Skill Ripjaws X Series 16GB (4 x 4GB) 240-Pin DDR3 SDRAM 1600 (PC3 12800) Low Voltage Desktop Memory Model F3-12800CL9Q-16GBXM at Amazon.com
G.SKILL Ripjaws Series 4GB 240-Pin PC RAM DDR3 1600 (PC3 12800) Desktop Memory Model F3-12800CL9S-4GBRL - Newegg.com